<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="50" placeholder="请输入搜索内容" cancel-button="none"></uni-search-bar>
		</view>

		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchReaults.length !== 0">
			<view class="sugg-item" v-for="(item,index) in searchReaults" :key="index" @click="gotodetail(item)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>

		<!-- 搜索历史列表 -->
		<view class="history-box" v-else>
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="clean"></uni-icons>
			</view>
			<view class="history-list">
				<uni-tag v-for="(item,index) in histories" :key="index" :text="item" @click="gotoGoodsList(item)"></uni-tag>
			</view>

		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				//延时器的声明
				timer: null,
				//搜索关键词
				kw: '',
				searchReaults: [],
				historylist: ['a', 'app', 'apple']
			};
		},
		onLoad() {
			this.historylist = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods: {
			//输入事件
			input(e) {
				clearTimeout(this.timer)
				this.timer = setTimeout(() => {
					this.kw = e
					this.getSearchList()
					// console.log(this.kw);
				}, 500)
				// console.log(e);
			},
			async getSearchList() {
				if (this.kw.length === 0) {
					this.searchReaults = []
					return;
				}

				const {
					data: res
				} = await uni.$http.get('api/public/v1/goods/qsearch', {
					query: this.kw
				})
				if (res.meta.status !== 200) return uni.$showMsg()
				this.searchReaults = res.message

				this.saveSearchHistory()
			},
			gotodetail(item) {
				// console.log(item.goods_id);
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
				})
			},
			saveSearchHistory() {
				// this.historylist.push(this.kw)
				
				//将array数组转化为set对象
				const set = new Set(this.historylist)
				console.log(set)
				//调用set对象的select方法,移除对应的元素
				set.delete(this.kw)
				//调用set对象的add方法，向set中追加元素
				set.add(this.kw)
				//将set对象转化为array数组
				this.historylist = Array.from(set)
				
				
				//对搜索历史数据进行持久化的存储
				uni.setStorageSync('kw',JSON.stringify(this.historylist))
			},
			clean(){
				this.historylist = []
				uni.setStorageSync('kw','[]')
			},
			gotoGoodsList(kw){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query=' + kw
				})
			}
		},

		computed: {
			histories() {
				return [...this.historylist].reverse()
			}
		}
	}
</script>

<style lang="scss">
	.search-box {
		position: sticky;
		top: 0%;
		z-index: 999;
	}

	.sugg-list {
		padding: 0 5px;

		.sugg-item {
			font-size: 15px;
			display: flex;
			align-items: center;
			justify-content: space-between;
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #c0c0c0;


			.goods-name {
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
			}
		}

	}

	.history-box {
		padding: 0 5px;

		.history-title {
			display: flex;
			justify-content: space-between;
			height: 40px;
			align-items: center;
			font-size: 13px;
			border-bottom: 1px solid #efefef;
		}

		.history-list {
			display: flex;
			flex-wrap: wrap;
		}

		.uni-tag {
			margin-top: 5px;
			margin-right: 5px;
		}
	}
</style>